Heating apparatus



June 22, 1926. 1,589,702

- R. A. ISENBE'RG HEATING APPARATUS Filed August 51 1925 Patented June 22, 1926.

RUDOLF A. ISENBERG, OF MONTEREY, CALIFORNIA.

HEATING APPARATUS.

Application filed August 31, 1925. Serial No. 53,561.

My invention relates to improvements in heating elements for fireplaces and the like wherein a hollow heating element is mounted against the back wall of a fireplace whereby the heat normally absorbed by suchloack wall is utilized for heating a current of air delivered into a room.

The primary object of my invention is to provide an improved heating element to increase the heating effect and efliciency of a fireplace. V

Another'object is to provide an improved device operatingin conjunction with an open fireplace for directing a current of heated air into a room to augment the direct heat normally given off from the tire place, and to alford ventilation.

A further object is to provide a device adapted to deliver heated air drawn from a point outside of a room to maintain a supply of fresh air within the room.

Another object is to provide an improved device of the character described arranged to draw air either from inside or outside of a room as desired and to deliver said air into said roomin a heated condition. v

still further object is to provide an improved heating element which may be easily and economically installed and which willv not materially obstruct the fireplace or the chimney.

I accomplish these'and other objects by means of the device disclosed in the drawings forming a part of the present specification wherein like characters of reference are used to designate similar. parts throughout said specification and drawings and in which, i r

Fig. 1 is a frontv elevation of a fire place showing the application of my improved heating element thereto. Fig. 2 is a vertical transverse section of the fireplace and heating element as shown in Fig. 1, and

Fig. 3 is a broken detail of the intaker damper and actuating means therefor.

Referring to the drawings my invention will be seen to consist of a heatlng element designated in general by the numeral 1 and consisting of a hollow body portion shaped to fit adjacent the back wall 2 of a fireplace designated in general by the numeral 3, said body portion having a forwardly inclined extension 4 formed upon the upper portion thereof. The extension 4 is formed at an angle corresponding to the inclination of the inclined portion 6 of the back wall of the ment 1 is made from castiron or other suitable metal and the walls of the body and the extension to form a heating chamber 8.

An inlet passage 9 is connected into. the lower portion of the body 1 of the heating element, said passage preferably opening into the back of the heating element and being extendedto apoint from which a suitable supply for cool fresh air may be drawn. An outlet passage 11 is connected to the upper endoft-he extension 4c and arranged to open outwardly into the room containing the fireplace. A damper 12 of any suitable construction is mounted in connection with the outer end of the outlet passage 11 whereby the opening between said passage and the room may be regulated'or entirely closed as desired. i

A second inlet passage 14 is provided to communicate between the heating element 1 and intake opening 16 positioned at any con venien't point. within the room containing the fireplace. This secon'd'inlet passage 14 is preferably connected into the inlet passage 9 immediately back of the body of the heat.- ing element 1. A damper 17 is pivotally mounted adjacent the intersection of the passages 14 and 9 and arranged to be moved to close either of said passages and at the same time to open the other passages as desired. The damper 17 is preferably mounted in connection with a shaft 18 having an arm 19 secured upon the other end thereof,

said arm being pivotally connected to an actuating'rod 21 extending into the room containing the fireplace and arranged to be moved to swing the arm 19 and the damper 17 through an angle of ninety degrees as shown in Figs 2 and 3 of the drawings. A stop 22 is arranged to engage notches 23 formed in the. rod 21 to hold the rod and damper in either position desired.

In operation, the heating element is placed in the back of the fireplace and the air passages are connected substantially as shown.

When now a fire is built in the fire place, the heat, which is ordinarily absorbed by the back wall of the fireplace will heat the adjacent wall of the heating element 1 which in turn will heat the air contained within the heat chamber 8. Assuming the damper 17 to be in the position shown in full lines and the damper 12 in open position into the room. As the heated air passes out of the heat chamber, fresh cool air from the inlet passage 9 will enter the chamber 8 to replace the heated air. This fresh air will be quickly heated within the chamber 8 and will in turn rise and be delivered into the room to be replaced by additional volumes of cool air from the inlet 9. In this manner a coin tinuous current of fresh air will be drawn in and heated and delivered into the room, thus maintaining a fresh air supply and at the same time utilizing the heat of the back wall of the fireplace to heat the air and thereby assist in heating the room.

When the outside air drawn through the inlet 9 is very cold, the damper 17 may be moved to the position indicated in dotted lines, thereby closing the inlet passage 9 and opening the inlet passage 14. The air drawn into the heat chamber will now be taken from the room this air being heated and redelivered into the room. A. continuous circulation of air will thus be caused, the cooler air from the lower portion of the room being drawn in through the inlet passage 14, heated within the chamber 8, and redelivered through the outlet passage 11 into the room, the heat thus carried into the room being added to the direct heat given off from the fireplace and greatly increasing the efficiency with which the room is heated.

The heating element 1 is so constructed that it occupies but a slight amount of space at the back of the fireplace, and at the same time affords a relatively large heating surface. The inclined tapered extension & extends directly over the fireplace and so is in a position to obtain the greatest degree of heat therefrom. By tapering the extension 4 as shown, the extension and the outlet passage 11 connected thereto may be made of a size adapted to give an efficient circulation of air without materially obstructing the chimney or interfering with the draft therethrough. The heating element thus forms a metal back wall for the furnace which will operate to reflect heat outwardly into the room in the ordinary manner and at the same time to utilize the heat absorbed to further heat the room. In this manner the efficiency of the fireplace is greatly increased and at the same time a circulation of air is obtained which insures proper ventilation of the room.

The construction and arrangement of the device is of course subject to modification in many ways without departing from the spirit of my invention. I therefore do not wish to restrict myself to any specific construction or arrangement of the elements disclosed, but desire to avail myself of all modifications which may fall within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is,

1. The combination with a fireplace of a heating element mounted in the back thereof; an air passage connected into the lower portion of the heating element and opening at a point outside a room containing the fireplace; a second air passage communicating with the first mentioned passage and opening at a point within the room; means for closing either of said passages and open.- ing the other passage for admitting cool air into the heating element to be heated; and an outlet air passage connected into the top of the heating element and openinginto the room for conducting heated air thereinto.

2. The combination with a fireplace of a heating element mounted in the back thereof; an air passage connected into the lower portion of the heating element and opening at a point out-side a room containing the fireplace; a second air passage communicating with the first passage and the heating element and opening at a point within the room; a damper pivotally mounted adjacent the intersection of said first and second air passages; means for operating the damper to close either passage and open the other for admitting cool air into the heating element to be heated; and an outlet air passage connected into the top of the heating element and opening into the room for conducting heated air thereinto.

In witness whereof I hereunto set my signature.

RUDOLF A. ISENBERG. 

